September
September · May · August
United States · 1991–2020
September leads for comfortable weather in Franklin: typically 25.9°C by day, 12.1°C at night, with 71 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · August
August · July · June
October · September · May
The weakest month is January, scoring 5 against September’s 81 — days reach only 3.5°C, 20° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.5°C | -6.4°C | 73 mm | 7.6 | 9 h 39 | 5 | Strong coverage |
| February | 6.2°C | -4.6°C | 60 mm | 6.4 | 10 h 38 | 5 | Strong coverage |
| March | 11.4°C | -0.4°C | 87 mm | 8.9 | 11 h 49 | 18 | Strong coverage |
| April | 18.2°C | 4.7°C | 110 mm | 9.9 | 13 h 11 | 45 | Strong coverage |
| May | 23.4°C | 10.8°C | 109 mm | 10.4 | 14 h 20 | 73 | Strong coverage |
| June | 27.8°C | 15.7°C | 119 mm | 9.1 | 14 h 57 | 69 | Strong coverage |
| July | 30°C | 17.6°C | 94 mm | 7.9 | 14 h 42 | 63 | Strong coverage |
| August | 29.3°C | 16.5°C | 70 mm | 5.7 | 13 h 43 | 72 | Strong coverage |
| September | 25.9°C | 12.1°C | 71 mm | 5.9 | 12 h 24 | 81 | Strong coverage |
| October | 19.1°C | 5.3°C | 79 mm | 7 | 11 h 05 | 57 | Strong coverage |
| November | 11.8°C | 0.2°C | 74 mm | 7.6 | 9 h 57 | 24 | Strong coverage |
| December | 5.8°C | -3.7°C | 83 mm | 7.4 | 9 h 23 | 5 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.1°C24 Jan 1967 | -31.7°C29 Jan 1963 | 76 mm7 Jan 2010 | 182 mm1959 · driest 6 mm in 1981 | 71 |
| February | 25.6°C28 Feb 2000 | -24.4°C3 Feb 1985 | 58 mm2 Feb 1988 | 169 mm2019 · driest 0 mm in 2010 | 69 |
| March | 30.0°C23 Mar 2026 | -21.7°C3 Mar 1980 | 73 mm5 Mar 1963 | 246 mm1964 · driest 20 mm in 1960 | 70 |
| April | 31.1°C25 Apr 1960 | -7.8°C5 Apr 1995 | 71 mm29 Apr 1996 | 275 mm2011 · driest 17 mm in 1962 | 72 |
| May | 35.0°C19 May 1962 | -2.8°C1 May 1963 | 105 mm19 May 2020 | 308 mm1968 · driest 5 mm in 2007 | 72 |
| June | 37.8°C26 Jun 1988 | 3.3°C10 Jun 1988 | 101 mm19 Jun 2021 | 274 mm2015 · driest 11 mm in 1962 | 70 |
| July | 40.0°C5 Jul 2002 | 5.6°C1 Jul 1988 | 130 mm21 Jul 1973 | 253 mm1958 · driest 13 mm in 1974 | 73 |
| August | 38.3°C4 Aug 1964 | 3.9°C30 Aug 1986 | 79 mm29 Aug 1994 | 182 mm1974 · driest 3 mm in 2003 | 70 |
| September | 38.3°C2 Sep 1953 | -1.7°C30 Sep 1963 | 111 mm14 Sep 1979 | 185 mm1971 · driest 5 mm in 1963 | 69 |
| October | 34.4°C3 Oct 2019 | -8.9°C27 Oct 1962 | 67 mm20 Oct 1993 | 184 mm1983 · driest 4 mm in 1963 | 69 |
| November | 27.2°C1 Nov 2016 | -22.8°C30 Nov 1958 | 71 mm5 Nov 2017 | 222 mm1985 · driest 14 mm in 1991 | 69 |
| December | 23.3°C3 Dec 1982 | -29.4°C22 Dec 1989 | 68 mm22 Dec 1998 | 214 mm1990 · driest 10 mm in 1976 | 67 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 2 | <1 |
| February | <1 | 0 | 22 | 2 | <1 |
| March | <1 | 0 | 17 | 3 | <1 |
| April | 4 | <1 | 6 | 4 | 0 |
| May | 13 | 3 | <1 | 4 | 0 |
| June | 23 | 10 | 0 | 4 | 0 |
| July | 27 | 16 | 0 | 3 | 0 |
| August | 26 | 13 | 0 | 2 | 0 |
| September | 18 | 6 | 0 | 2 | 0 |
| October | 5 | <1 | 4 | 2 | 0 |
| November | <1 | 0 | 15 | 3 | <1 |
| December | 0 | 0 | 22 | 3 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 27% | 8% | 32% | -0.7–6.1°C |
| February | 1% | 27% | 8% | 29% | 1.2–8.9°C |
| March | 9% | 30% | 10% | 36% | 7.6–14.7°C |
| April | 25% | 33% | 12% | 44% | 15.0–20.1°C |
| May | 51% | 34% | 12% | 44% | 20.5–26.4°C |
| June | 69% | 30% | 13% | 35% | 25.7–29.4°C |
| July | 73% | 27% | 11% | 29% | 28.6–31.6°C |
| August | 78% | 23% | 9% | 20% | 27.6–30.8°C |
| September | 72% | 22% | 9% | 19% | 23.8–28.2°C |
| October | 38% | 22% | 8% | 22% | 16.8–21.5°C |
| November | 9% | 28% | 9% | 30% | 8.4–14.8°C |
| December | <1% | 27% | 9% | 31% | 1.8–9.0°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page